1.Definition: causing or able to cause nausea

Related Adjective(s):nauseating, nauseous, noisome, offensive, queasy, sickening, vile

2.Definition: highly offensive; arousing aversion or disgust

"A loathsome disease"

Related Adjective(s):disgustful, disgusting, distasteful, foul, loathly, repellant, repellent, repelling, revolting, skanky, wicked, yucky